Perhaps you should try some spelling variations:
sach nganh » sach ngan, sach tranh, cac nganh
cach nhanh » cac nganh, cac thanh
nganh ky » nganh y, nganh xay, hanh ky
cac nhan » ca nhan, cac nha, cam nhan
tu sach » thu sach, su sach, te sach
ky khi » ky thi, ly khi
li khi » ly khi

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (( tu sach nganh ky khi đong luc ) or ( thu ((cach nhanh) OR (cac nhan)) li khi đong luc ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tu sach nganh ky khi đong luc ) OR ( thu ((cach nhanh) OR (cac nhan)) li khi đong luc )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( tu sach nganh ky khi đong luc ) or ( thu ((cach nhanh) OR (cac nhan)) li khi đong luc ))".
• Adding a wildcard symbol may retrieve word variants: (( tu sach nganh ky khi đong luc ) or ( thu ((cach nhanh) OR (cac nhan)) li khi đong luc ))*.